Gun sight



Seamh oorfs Dec. 21, 1937. H, E. CAMPBELL- GUN SIGHT Filed Dec. 16, 1936 2 Sheets-Sheet 1 INVENTOR.

fl 'flb 'ATIORNEY.

33n GtUlVlt I HFCAL INS i HUlVitN i SE han 59 Dec. 21, 1937. V H E, CAMPBELL 2,102,677

GUN SIGHT Fild Dec. 16, 1936 I 2 shets sheet 2 w WIIIIIIII III-Hm k EL A n 33. GEOMEI HIUAL \Nbl numui u.

Patented Dec. 21, 1937 UNITED STATES PATENT OFFICE 8 Claims.

This invention relates to improvements in gun sights, especially the sight for the breech end of a gun. An object of the invention is to provide a rear sight for a firearm, that has readily adjustable members so arranged and mounted on a gun that the marksman is enabled regardless of various conditions of light and shadows to center his vision through the device accurately in line with the bore of the gun barrel and the target.

Another object of the invention is to alford a rear sight having a small aperture extending therethrough to provide apeep opening for accurate aiming and also lateral wings so arranged as to enable the marksman to readily locate the peep opening.

A further object is to provide in an adjustable gun sight oppositely movable members having notches and projections so arranged as to be selectively brought into operative position and serve as a sight opening or point accordingly as positioned.

And a further object is to construct a rear gun sight having adjustable members so constituted as to operate selectively as an open sight in various degrees of openness or as a sight more or less restricted with respect to the sight opening accordingly as said members are adjusted.

Other objects and advantages of the invention will appear in the following description.

An illustrative embodiment of the invention is shown in the accompanying drawings, in which:-

Fig. 1 is a side view of a firearm to which the invention is applied;

Fig. 2 is a rear view of a gun sight embodying the invention arranged for left-handed operation;

Fig. 3 is a similar view of the gun sight arranged for right-handed operation;

Fig. 4 is a cross-section of a gun barrel including a front sight mounted thereon;

Fig. 5 is a diagram of the device adjusted for use as a wide open sight;

Fig. 6 is a diagram of the device adjusted for use as a peep sight;

Fig. '7 is a similar diagram showing the device adjusted to provide a V sight opening with lateral leads;

Fig. 8 is a View showing the device adjusted to provide a point and lateral notches or a W sight;

Fig. 9 is a diagram showing the device adjusted as a V sight;

Fig. 10 is a diagram showing the device adjusted as an elevated open sight for use in long range firing;

Fig. 11 is a diagram showing the device adjusted to provide an oval side opening and notch;

Fig. 12 is a diagram showing the device adjusted to provide a more or less restricted sight opening and a'notch;

Fig. 13 is a diagram showing the device adjusted to provide a generous sight opening, commonly referred to as a buck-horn sight;

Fig. 14 is a diagram similar to Fig. 13, showing also a central projection and lateral notches;

Fig. 15 is another diagram showing the device adjusted to provide a central notch and lateral notches that are utilized selectively in sighting the firearm variably according to the strength of wind moving transverse to the line of fire;

Fig. 16 is a longitudinal section of the device; and

Fig. 17 is a transverse section of the device.

The illustrative embodiment of the invention consists of a block I having a bore extending therethrough provided with a base 2 by means of which the block is secured in the usual manner to the firearm. In one end of the block is rotatively mounted a gear 3 rotatable in the bore thereof and provided in its outer end with a face-plate 4, hereinafter more particularly described, and in the opposite end of the block is rotatively mounted a second gear 5 axially alined in the block I with the gear 3.

In the block is secured a bushing 6 having journaled therein an operating shaft 1 provided on its outer end with a nut 8, preferably knurled, by which said shaft is manipulated. Upon the inner end of the shaft is secured a pinion 9 that has engagement with both of the gears 3 and 5 disposed so that upon rotation of the shaft 1 said gears are correspondingly moved angularly upon their axis respectively in opposite directions. The bushing 6 is held in place in the block preferably by a set-screw ID.

A second face-plate I l is provided with a shaft [2 that extends through the hub l3 of the gear 4, and also through the gear 5, and has threaded on its outer end an adjusting nut I4, there being a compression spring l5 disposed within the nut that bears against the adjacent end of the gear 5. The gear 5 and the shaft l2 have a splined connection l6 that permits axial play of the shaft in said gear and prevents relative rotation thereof. By expansive force of the spring IS the face-plate H is held against the face-plate 4, and the gears 3 and 5 are yieldingly. held frictionally in place against the corresponding ends of the block I By adjustably turning the nut l 4 on the shaft the pressure on the spring between the nut l4 and gear 5 is thereby varied as desired and the restraint to the turning movement of the gears and face-plates is modified accordingly. The shaft I2 has also an axial bore extending therethrough to provide a sight opening H.

The face-plates 4 and I I in profile are similar, the one being the counterpart of the other and disposed oppositely. Each face-plate has a curved prong or wing 18 and I8 and adjacent one side of said prong is made notches l9 and an intervening spur 20, and upon the opposite side thereof are made notches 2| and an intervening projection 22.

The face-plates each have an opening 23 therein adapted to register with the corresponding opening in the other face-plate when the faceplates are adjusted to a definite position and thereby afiord a peep sight opening 24.

The gears 3 and 5, pinion 9 and the shaft l2 are assembled in connection with the block I relatively so that the wings on the face-plates extend opposite each other angularly to an equal extent from a perpendicular line passing through the sight opening I1. By this arrangement as the face-plates are rotated upon their common axis, by manipulation of the thumb-nut 8, the wings l8 and I8 are adjustably moved toward or from each other and relative to the perpendicular line to a more or less extent resulting in exposure of the sight to the View of the marksman varying with those indicated in Figs. 5 and 15 inclusive as well as intermediate exposures.

Thus, when the face-plates are adjusted to the position shown in Fig. 5 a wide open top sight is afforded; when the plates are adjusted as in Fig. 6, a wide open top sight and also a peep-sight 24 is made available; when the plates are adjusted as in Fig. 7, a wide open top sight is afiorded in conjunction with a V notch sight 25 and lateral leads 26 adjacent thereto; when the plates are adjusted as in Fig. 8, there is afforded a central spur sight between the wings; when the plates are adjusted as in Fig. 9, a V notch sight opening I 9 between the wings is afforded; when the plates are adjusted as in Fig. 10, a sight is afforded by the convergence of the wings useful in firing at long range; when the plates are adjusted as in Fig. 11, a sight opening is afforded between the wings and also a sight slot 21 contiguous with the opening between the wings; in Fig. 12 the plates are adjusted to afford a sight opening between the wings and a generous sight slot 28 contiguous with said opening; in Fig. 13 the plates are adjusted so that the wings are spread apart to afiord a generous sight opening therebetween, this form of sight being known generally by marksman as a buck-horn sight; when the plates are adjusted as in Fig. 14 there is afforded a sight opening between the wings, a central projection 22 and the adjacent notches 2| on either side thereof; and in Fig. 15 is shown the' plates adjusted so as to aiford a central notch 29 between the wings and lateral projections 30 and adjacent notches 3|.

Through adjustments of the face-plates, accomplished readily by manipulation of the thumb-nut 8, a wide variety of sight openings is made available so that the marksman may select the sight opening best suited to his atmospheric environment. For instance, on a cloudy day,

when the light is not bright, there is aiforded a wide range and better view by turning the points of the wings outwardly; and when the light is bright a quicker more accurate view is obtainable by turning the wings inwardly toward each other to constrict the sight opening therebetween so as to clear up the blur and sharpen the view of targets at various distances.

As the plates have curved wings, spurs, projections and notches, the marksman is enabled to adjust the plates suitably for prevailing light conditions, range, velocity of cross winds, and gauge a suitable head lead in sighting the firearm on moving targets.

The profile of the face plates, the arrangement of the gears operatively associated therewith, and the actuating means therefor are herein set forth as merely an example of the invention. 1 do not, however, restrict myself to the precise design of the individual parts or their assemblage as shown, as other designs and arrangement of parts may readily be made by exercise of ordinary mechanical skill.

What I claim is:

1. An adjustable gun sight, said sight being constituted of an apertured block including means for attachment thereof to a gun, oppositely disposed gears positioned respectively in the apertured ends of said block to have rotary movement, a face-plate secured to one of said gears provided with a curved wing, peripheral notches and projections adjacent thereto, and also a peep sight opening therein, a second face-plate, the counterpart of the other face-plate, provided with a shaft having an axial sight opening, said shaft extending through said gears, a spring and adjusting nut therefor on said shaft for frictionally retaining said gears in operative position; and

an operating member including a pinion meshed,

with both of said gears adapted to impart rotary movement to said face-plates simultaneously in opposite directions.

2. An adjustable gun sight, said sight being constituted of an apertured block including means for attachment thereof to a gun, oppositely disposed gears positioned respectively in the apertured ends of said block to have rotary movement, a face-plate secured to one of said gears provided with a curved wing, peripheral notches and projections adjacent thereto, a second faceplate, the counterpart of the other face-plate, provided with a shaft having an axial sight opening, said shaft extending through said gears, a spring and adjusting nut therefor on said shaft for frictionally retaining said gears in operative position; and an operating member including a pinion meshed with both of said gears adapted to impart rotary movement to said face-plates simultaneously in opposite directions.

3. An adjustable gun sight, said sight being constituted of an apertured block including means for attachment thereof to a gun, oppositely disposed gears positioned respectively in the apertured ends of said block to have rotary movement, a face-plate secured to one of said gears provided with a curved wing, peripheral notches and projections adjacent thereto, and also a peep sight opening therein, a second face-plate, the counterpart of the other face-plate, provided ,with a shaft extending through said gears, a spring and adjusting nut therefor on said shaft for frictionally retaining said gears in operative position; and an operating member including a pinion meshed with both of said gears adapted to impart rotary movement to said face-plates simultaneously in opposite directions.

4. An adjustable gun sight, said sight being constituted of an apertured block including means for attachment thereof to a gun, oppositely disposed gears positioned respectively in the aper- 33. GEOMETRICAL lNSlHUMtN as,

tured ends of said block to have rotary movement, a face-plate secured to one of said gears provided with a curved wing, peripheral notches and projections adjacent thereto, a second face-plate, the counterpart of the other face-plate, provided with a shaft extending through said gears, a spring and adjusting nut therefor on said shaft for frictionally retaining said gears in operative positions; and an operating member including a pinion meshed with both of said gears adapted to impart rotary movement to said face-plates simultaneously in opposite directions.

5. An adjustable gun sight constituted of a block including means for attachment thereof to a gun, face-plates mounted in connection with said block to have rotary movement upon a common axis, said face-plates having oppositely curved wings, and also peripheral notches and projections adjacent the wings thereof, and a manually-operated gear mechanism adapted to impart equal rotary movement simultaneously in opposite directions to said face-plates.

6. An adjustable gun sight constituted of a block including means for attachment thereof to a gun, face-plates mounted in connection with said block to have rotary movement upon a common axis, said face-plates having oppositely curved wings, and a manually-operated gear mechanism adapted to impart equal rotary movement simultaneously in opposite directions to said face-plates.

7. An adjustable sight for a gun, said sight having two face-plates arranged adjacent each other and mounted to have rotary movement upon a common axis, each of said face-plates being the counterpart of the other and provided with a curved wing, and also having peripheral notches and projections adjacent the sides of the wings, and manually-operated mechanism associated with said face-plates adapted to adjustably turn said face-plates equally in opposite directions.

8. An adjustable sight for a gun, said sight having two face-plates arranged adjacent each other and mounted to have rotary movement upon a common axis, each of said face-plates being the counterpart of the other and provided with a curved wing, and manually-operated mechanism associated with said face-plates adapted to adjustably turn said face plates equally in opposite directions.

HOMER E. CAMPBELL. 

